Automatic flash light control device for camera

Details Automatic flash light control device for camera Automatic flash light control device for camera

1978-08-25

1981-06-23

Hix, L. T.

354145, G03B 1505

Patent

active

042747228

ABSTRACT:
A single lens reflex camera having an interchangeable lens and provided with an exposure control device of the aperture size priority type is provided with a flash light control device in which the amount of light emitted by a flash light tube is controlled by a control circuit according to the film sensitivity of the film in the camera and the selected diaphragm aperture size. The selected diaphragm aperture size is input into the control circuit in terms of first information representing the displacement of the selected diaphragm aperture size from the full aperture size of the lens and second information representing the full aperture size of the lens.

REFERENCES:
patent: 3683765 (1972-08-01), Iura
patent: 3710701 (1973-01-01), Takishima et al.
patent: 3738240 (1973-06-01), Mitani et al.
patent: 4005444 (1977-01-01), Uchiyama et al.
patent: 4023188 (1977-05-01), Ueda et al.
patent: 4047194 (1977-09-01), Nakamura et al.
patent: 4078242 (1978-03-01), Uchiyama et al.
patent: 4095242 (1978-06-01), Tsunekawa et al.
patent: 4127325 (1978-11-01), Ohtaki et al.

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